Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive signaling from a base station including a configuration for multiple transmission time intervals (TTIs) including uplink symbols, downlink symbols, flexible symbols, or a combination. The UE may receive a grant scheduling one or more repetitions of an uplink shared channel carrying an uplink random access message from the base station. The UE may determine available TTIs for the repetitions based on a pre-TTI evaluation of symbols according to a rule that defines types of symbols available for the uplink shared channel. The UE may transmit the repetitions on the available TTIs according to the rule.
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2. The apparatus of claim 1, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
4. The apparatus of claim 3, wherein the indication is a one-bit indication that is indicative of whether the flexible symbols are to be considered in the evaluation.
7. The apparatus of claim 1, wherein the subset of the flexible symbols excludes flexible symbols configured as synchronization signal/physical broadcast channel (SS/PBCH) block symbols.
9. The apparatus of claim 1, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
10. The apparatus of claim 1, wherein the plurality of transmission time intervals comprise a set of slots in a frame or a set of slots in a plurality of frames.
12. The method of claim 11, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
13. The method of claim 11, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
15. The apparatus of claim 14, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
16. The apparatus of claim 14, wherein the subset of the flexible symbols excludes flexible symbols configured as synchronization signal/physical broadcast channel (SS/PBCH) block symbols.
17. The apparatus of claim 14, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
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May 24, 2023
April 30, 2024
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